#!/bin/ksh
# Change the below to your SEA device
# To determine this, at the VIO Server command line : lsdev -virtual
# and look for the SEA device
# If you have multiple SEA make sure each script (one per SEA) uses a different SEANUM
export SEANUM=1
export interface=en0
export timestamp=$1

if [ "$timestamp" == "T0001" ]
then
	# truncate and start log
	echo SEA$SEANUM,$interface,ReadBytes,WriteBytes,ReadPackets,WritePackets >sea$SEANUM.log
	# seed the database 
	entstat $interface 2>/dev/null | grep ^Bytes:   | sed 's/Bytes://g'   >sea$SEANUM.bytes
	entstat $interface 2>/dev/null | grep ^Packets: | sed 's/Packets://g' >sea$SEANUM.packets
else
	# read the database
	read oldrbytes oldwbytes <sea$SEANUM.bytes
	read oldrpackets oldwpackets <sea$SEANUM.packets

	entstat $interface 2>/dev/null | grep ^Bytes:   | sed 's/Bytes://g' | read newrbytes   newwbytes
	entstat $interface 2>/dev/null | grep ^Packets: | sed 's/Packets://g' | read newrpackets newwpackets

	# do the maths
integer deltarbytes 
integer deltawbytes 
integer deltarpackets 
integer deltawpackets 
let deltarbytes=$newrbytes-$oldrbytes
let deltawbytes=$newwbytes-$oldwbytes
let deltarpackets=$newrpackets-$oldrpackets
let deltawpackets=$newwpackets-$oldwpackets

	# save the database
	echo $newrbytes $newwbytes     >sea$SEANUM.bytes
	echo $newrpackets $newwpackets >sea$SEANUM.packets
	
	# write the log
	echo SEA$SEANUM,$timestamp,$deltarbytes,$deltawbytes,$deltarpackets,$deltawpackets >>sea$SEANUM.log
fi